What are the potential pitfalls of using frames in PHP web development?

Using frames in PHP web development can lead to issues with SEO, as search engines may have difficulty indexing content within frames. Additionally, frames can cause usability problems for users, such as difficulty bookmarking specific pages or navigating back and forth within the site. To solve these issues, it is recommended to avoid using frames and instead utilize modern web development techniques like CSS for layout and AJAX for dynamic content loading.

<!DOCTYPE html>
<html>
<head>
    <title>Avoid Frames in PHP Web Development</title>
    <style>
        /* CSS for layout */
    </style>
</head>
<body>
    <header>
        <!-- Header content here -->
    </header>
    <nav>
        <!-- Navigation menu here -->
    </nav>
    <main>
        <!-- Main content here -->
    </main>
    <footer>
        <!-- Footer content here -->
    </footer>
</body>
</html>